VHRR (in GEO)

Very High Resolution Radiometer

Satellites

INSAT-1 A/B/C/D, INSAT-2 A/B/D/E, INSAT-3A, Kalpana-1

Status

Operational – Utilised in the period: 1982 to ~ 2013

Mission

Multi-purpose VIS/IR imagery and wind derivation by tracking clouds and water vapour features

Instrument type

3-channel VIS/IR radiometer

Coverage/cycle

Full disk every 3 hours, more frequently on demand. Half-hourly triplets around 00 and 12 UT for winds

Resolution (s.s.p.)

8.0 km for IR channels; 2 km for the VIS channel

Resources

Mass: … kg - Power: … W - Data rate: … kbps

Central wavelength

Spectral interval

Radiometric accuracy (SNR or NEΔT)

0.65 µm

0.55 - 0.75 µm

> 6 @ 2.5 % albedo

6.40 µm

5.70 - 7.10 µm

0.50 K @ 300 K

11.5 µm

10.5 - 12.5 µm

0.25 K @ 300 K